Elastoplasticity Mediates Dynamical Heterogeneity Below the Mode Coupling Temperature.

@article{Chacko2021ElastoplasticityMD,
  title={Elastoplasticity Mediates Dynamical Heterogeneity Below the Mode Coupling Temperature.},
  author={Rahul N. Chacko and François P. Landes and Giulio Biroli and Olivier Dauchot and Andrea J. Liu and David R. Reichman},
  journal={Physical review letters},
  year={2021},
  volume={127 4},
  pages={
          048002
        }
}
As liquids approach the glass transition temperature, dynamical heterogeneity emerges as a crucial universal feature of their behavior. Dynamic facilitation, where local motion triggers further motion nearby, plays a major role in this phenomenon. Here we show that long-ranged, elastically mediated facilitation appears below the mode coupling temperature, adding to the short-range component present at all temperatures. Our results suggest deep connections between the supercooled liquid and… 

Figures from this paper

Thirty milliseconds in the life of a supercooled liquid
We combine the swap Monte Carlo algorithm to long multi-CPU molecular dynamics simulations to analyse the equilibrium relaxation dynamics of model supercooled liquids over a time window covering ten
Computer simulations of the glass transition and glassy materials
. We provide an overview of the different types of computational techniques developed over the years to study supercooled liquids, glassy materials and the physics of the glass transition. We
Efficient d-dimensional molecular dynamics simulations for studies of the glass-jamming transition.
We develop an algorithm suitable for parallel molecular dynamics simulations in d spatial dimensions and describe its implementation in C++. All routines work in arbitrary d; the maximum simulated d
2 2 D ec 2 02 1 hdMD : Efficient d-dimensional molecular dynamics for studies of the glass-jamming transition
We develop an algorithm suitable for parallel molecular dynamics simulations in d spatial dimensions and describe its implementation in C++. All routines work in arbitrary d; the maximum simulated d
Excess wings and asymmetric relaxation spectra in a facilitated trap model.
TLDR
A minimal empirical model is constructed to describe this physics and introduce dynamic facilitation in the trap model, which was initially developed to capture the thermally activated dynamics of glassy systems.
A theory of localized excitations in supercooled liquids.
TLDR
The role of structure and elasticity in driving glassy dynamics through the creation and relaxation of localized excitations is strengthened through the created and relaxed elastic bonds holding the local structure of an inherent state.

References

SHOWING 1-10 OF 53 REFERENCES
Interplay of rearrangements
  • strain, and local structure during avalanche propagation, e-print arXiv:2009.11414
  • 2020
‘T’
  • P. Alam
  • Composites Engineering: An A–Z Guide
  • 2021
Aging in a mean field elastoplastic model of amorphous solids
We construct a mean-field elastoplastic description of the dynamics of amorphous solids under arbitrary time-dependent perturbations, building on the work of Lin and Wyart (2016) for steady shear.
Role of fluctuations in the yielding transition of two-dimensional glasses
We numerically study yielding in two-dimensional glasses which are generated with a very wide range of stabilities by swap Monte-Carlo simulations and then slowly deformed at zero temperature. We
Rejuvenation and shear banding in model amorphous solids.
TLDR
It is argued that the transition between brittle and ductile yielding in amorphous materials occurs around a comparable parent temperature, as well as the contributions of pressure and density changes, which are negligible compared with the changes of softness caused by structural rejuvenation.
Dynamical Heterogeneities in Glasses, Colloids, and Granular Media
1. Scientic interview on the glass transition 2. An overview of the theories of the glass transition 3. Overview of different characterisations of dynamic heterogeneity 4. Glassy dynamics and
Kinetic Ising model of the glass transition
Developpement d'une theorie des graphes pour des modeles d'Ising cinetiques a retournement de spins isoles. Application a une classe de modeles de spins presentant une dynamique fortement
Tunneling states in amorphous solids
A linear temperature dependence of the specific heat in amorphous solids at very low temperatures is shown to follow from an ionic tunneling model. Moreover, this model predicts both the observed
...
...